A year or two ago Jay Leno wrote about the subject in his (always excellent) column for Octane magazine. He gave a list of motors he used to be able to identify on the road just by the noise they made. Sadly very few modern cars have a distinctive sound ... or look, come to that.
There is one on our business park, a muppet with a 2.0L Audi TT and DSK gearbox who starts it from cold selects start and sport and then races to the gate to get the maximum blare blare, pop, pop sounds from the exhaust. I would recognise that anywhere now. At least until it drops oil and seizes from cold one day! It is already showing signs of blue smoke.